"Some of it can get really tiny, like the size of sesame seed," Diebel said.

Some volunteers have a background in archaeology, while others learn on the job.

Wiche has a degree in archaeology but most recently worked for the National Weather Service before she retired. The volunteer job, which she started in 2013, gives her a chance to use her degree.

"You learn a lot of new stuff because things have changed since I did it," Wiche said.

New volunteers are needed to help repackage some collections to upgraded storage containers, such as acid-free materials and plastic bags that don't release chemicals.

"Our understanding of materials for long-term storage of artifacts is constantly evolving," said Wendi Field Murray, archaeologist and collections manager.

Although repackaging the collections will be labor-intensive, Field Murray said it will give people a chance to learn a lot about North Dakota's history.

"There are going to be a lot of collections that potentially no one has seen in decades," she said.

Other volunteers interact with the public, such as working in the gift shop.

Don and Diane Rose greet visitors on Wednesday afternoons from the information desk.

"We only work one afternoon a week, but boy we just look forward to it," Diane Rose said. "It's a fun place to come. It's a fun place to work."

In paleontology, volunteers help prepare fossils or catalog and label specimens for storage. The archives division has volunteers who help digitize materials.

As the museum division adds items to the collection, volunteers help catalog items and record information about each object.

Jenny Yearous, curator of collections management, said she likes volunteers who are detail-oriented and have a gentle touch for handling delicate items. One volunteer enjoys doing background research as she catalogs items.

"Just to have a curious mind is really helpful," Yearous said.

Most volunteer opportunities are Monday through Friday during the day. Campbell plans to host a behind-the-scenes tour in January for new volunteers.